Improvement in attaching knobs to their spindles



OLNEYL. SMITH.

Improvement inAtta ching Knobs td their Spindles.

N0. 115,650 I Patentedlune 6,1871.

.. Nrrnn i OLNEY L. SMITH, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN ATTACHING KNOBS T6 THEIR SPlNDLES.

Specification forming part of Letters Patent No. 115,650, dated June 6,1871.

I, OLNEY L. SMITH, of the city and county of Providence and State ofRhode Island'have invented a new and useful Improvement in Door-Knobs,of which the following is a specification, reference being had to theaccompanying drawing making part of the same, in which- Figure 1 is aplan view and section of my improved door-knob. Fig. 2 is a plan view ofthe same with the improved knob removed from the spindle. Fig". 3 is aview of the improved knob, separately. Fig. 4 is a view of theknob-shank, separately.

-Similar letters indicate corresponding parts in all the figures.

My improvement relates to the combination and arrangement of a knob, ascrew-sleeve forming the shank of a knob, and a threaded square spindle,in such a manner that by screwing the parts together the knob becomessecurely attached to the spindle in proper relation to the door.

Inthe drawin g,Sis the square spindle threaded at the corners, withthefixed knob B on one end, the other knob D being removable, to providefor putting it through a hole made for the purpose in the door, and foradapting its position on the spindle to the thickness of the door. Theremovable knob D is constructed with a square hole or socket to fit thespindle S, as shown in Fig. 3, and with a short screwnipple, F, Figs. 1and 3, provided witha lefthand thread on the outside. The knob-shank Nis constructed with a left-hand thread inside at one end, to screw uponthe nipple F of the knob, and'a right-hand thread at its other endfitted to screw upon the spindle S. The knob is secured to the spindlein the door by screwing the sleeve or shank N on the spindle up towithin the'length of the screw-nipple F of its intended position againstthe door; the knob D is then put on the spindle up to the end of theknob-shank, which is then turned and screwed upon the nipple F of theknob and up against the door on the spindle to its final position,where, by the screwing of the knob and shank firmly together, bothbecome permanently attached to .the spindle.

It will be seen that the knob turnsthe spin- V dle by means of itssquare socket; that the screw-sleeve or shank holds the knob on thespindle, and, by its arrangement of right Witnesses:

Isnno A. BROWNELL, JOHN F. PoLnnN.

n'rnn'r FFICE.

